/**
 * $Revision$
 * $Date$
 *
 * Copyright 2003-2007 Jive Software.
 *
 * All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.jivesoftware.smackx.workgroup.ext.history;

import org.jivesoftware.smack.packet.IQ;
import org.jivesoftware.smack.provider.IQProvider;
import org.xmlpull.v1.XmlPullParser;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Date;
import java.util.List;

/**
 * IQ provider used to retrieve individual agent information. Each chat session
 * can be mapped to one or more jids and therefore retrievable.
 */
public class AgentChatHistory extends IQ {
	private String agentJID;
	private int maxSessions;
	private long startDate;

	private List agentChatSessions = new ArrayList();

	public AgentChatHistory(String agentJID, int maxSessions, Date startDate) {
		this.agentJID = agentJID;
		this.maxSessions = maxSessions;
		this.startDate = startDate.getTime();
	}

	public AgentChatHistory(String agentJID, int maxSessions) {
		this.agentJID = agentJID;
		this.maxSessions = maxSessions;
		this.startDate = 0;
	}

	public AgentChatHistory() {
	}

	public void addChatSession(AgentChatSession chatSession) {
		agentChatSessions.add(chatSession);
	}

	public Collection getAgentChatSessions() {
		return agentChatSessions;
	}

	/**
	 * Element name of the packet extension.
	 */
	public static final String ELEMENT_NAME = "chat-sessions";

	/**
	 * Namespace of the packet extension.
	 */
	public static final String NAMESPACE = "http://jivesoftware.com/protocol/workgroup";

	public String getChildElementXML() {
		StringBuilder buf = new StringBuilder();

		buf.append("<").append(ELEMENT_NAME).append(" xmlns=");
		buf.append('"');
		buf.append(NAMESPACE);
		buf.append('"');
		buf.append(" agentJID=\"" + agentJID + "\"");
		buf.append(" maxSessions=\"" + maxSessions + "\"");
		buf.append(" startDate=\"" + startDate + "\"");

		buf.append("></").append(ELEMENT_NAME).append("> ");
		return buf.toString();
	}

	/**
	 * Packet extension provider for AgentHistory packets.
	 */
	public static class InternalProvider implements IQProvider {

		public IQ parseIQ(XmlPullParser parser) throws Exception {
			if (parser.getEventType() != XmlPullParser.START_TAG) {
				throw new IllegalStateException(
						"Parser not in proper position, or bad XML.");
			}

			AgentChatHistory agentChatHistory = new AgentChatHistory();

			boolean done = false;
			while (!done) {
				int eventType = parser.next();
				if ((eventType == XmlPullParser.START_TAG)
						&& ("chat-session".equals(parser.getName()))) {
					agentChatHistory.addChatSession(parseChatSetting(parser));

				} else if (eventType == XmlPullParser.END_TAG
						&& ELEMENT_NAME.equals(parser.getName())) {
					done = true;
				}
			}
			return agentChatHistory;
		}

		private AgentChatSession parseChatSetting(XmlPullParser parser)
				throws Exception {

			boolean done = false;
			Date date = null;
			long duration = 0;
			String visitorsName = null;
			String visitorsEmail = null;
			String sessionID = null;
			String question = null;

			while (!done) {
				int eventType = parser.next();
				if ((eventType == XmlPullParser.START_TAG)
						&& ("date".equals(parser.getName()))) {
					String dateStr = parser.nextText();
					long l = Long.valueOf(dateStr).longValue();
					date = new Date(l);
				} else if ((eventType == XmlPullParser.START_TAG)
						&& ("duration".equals(parser.getName()))) {
					duration = Long.valueOf(parser.nextText()).longValue();
				} else if ((eventType == XmlPullParser.START_TAG)
						&& ("visitorsName".equals(parser.getName()))) {
					visitorsName = parser.nextText();
				} else if ((eventType == XmlPullParser.START_TAG)
						&& ("visitorsEmail".equals(parser.getName()))) {
					visitorsEmail = parser.nextText();
				} else if ((eventType == XmlPullParser.START_TAG)
						&& ("sessionID".equals(parser.getName()))) {
					sessionID = parser.nextText();
				} else if ((eventType == XmlPullParser.START_TAG)
						&& ("question".equals(parser.getName()))) {
					question = parser.nextText();
				} else if (eventType == XmlPullParser.END_TAG
						&& "chat-session".equals(parser.getName())) {
					done = true;
				}
			}
			return new AgentChatSession(date, duration, visitorsName,
					visitorsEmail, sessionID, question);
		}
	}
}
